Class: Sqs::Signature

Inherits:
Object
  • Object
show all
Defined in:
lib/sqs/signature.rb

Overview

Class responsible for generating signatures to requests.

Implements algorithm defined by Amazon Web Services to sign request with secret private credentials

Class Method Summary collapse

Class Method Details

.generate(options) ⇒ Object

Generates signature for given parameters

Parameters:

options: a hash that contains options listed below

Options:

host: hostname access_key_id: access key id secret_access_key: secret access key method: method of the request (“GET” or “POST”) params: request parameters hash path: request path

Returns:

Generated signature for given hostname and request



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# File 'lib/sqs/signature.rb', line 25

def self.generate(options)
  host = options[:host]
  access_key_id = options[:access_key_id]
  secret_access_key = options[:secret_access_key]
  method = options[:method]
  params = options[:params]
  path = options[:path]


  string_to_sign = ""
  string_to_sign << method.to_s.upcase
  string_to_sign << "\n"
  string_to_sign << host.to_s.downcase
  string_to_sign << "\n"
  string_to_sign << path
  string_to_sign << "\n"
  string_to_sign << canonicalized_query_string(params)

  digest = OpenSSL::Digest::Digest.new("sha256")
  hmac = OpenSSL::HMAC.digest(digest, secret_access_key, string_to_sign)
  base64 = Base64.encode64(hmac)
  base64.chomp
end